251130201 has 32 divisors (see below), whose sum is σ = 404183040. Its totient is φ = 135489024.

The previous prime is 251130199. The next prime is 251130241. The reversal of 251130201 is 102031152.

It is not a de Polignac number, because 251130201 - 2¹ = 251130199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251130241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139956 + ... + 141738.

It is an arithmetic number, because the mean of its divisors is an integer number (12630720).

Almost surely, 2^251130201 is an apocalyptic number.

251130201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

251130201 is a deficient number, since it is larger than the sum of its proper divisors (153052839).

251130201 is a wasteful number, since it uses less digits than its factorization.

251130201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 251130201 is about 15847.0880921386. The cubic root of 251130201 is about 630.9084073360.

Adding to 251130201 its reverse (102031152), we get a palindrome (353161353).

The spelling of 251130201 in words is "two hundred fifty-one million, one hundred thirty thousand, two hundred one".